The first ionisation potential of Na,Mg,Al an | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) As we move across the period,nuclear charge increases and atomic size decreases,hence ionization enthalpy generally increases.For $Al$ $(3s^{2} 3p

Vedclass · Accepted Answer

$Na  Al < Si$

Vedclass · Answer

(A) As we move across the period,nuclear charge increases and atomic size decreases,hence ionization enthalpy generally increases.For $Al$ $(3s^{2} 3p^{1})$,the electron is removed from a partially filled $3p$ orbital.For $Mg$ $(3s^{2})$,the electron is removed from a stable,fully filled $3s$ orbital.Removal of an electron from a stable,fully filled orbital requires more energy than removal from a partially filled orbital.Thus,the ionization enthalpy of $Mg$ is greater than that of $Al$.The correct order of first ionization enthalpies is: $Na  Al < Si$.

The first ionisation potential of $Na$,$Mg$,$Al$ and $Si$ are in the order :-

Similar Questions

If $X$ and $Y$ are the second ionisation potentials of alkali and alkaline earth metals of the same period,then:

The first ionization potential of $Na, Mg, Al$ and $Si$ are in the order:

Which has maximum first ionization potential?

Ionization energy increases in the order

The correct decreasing order of first ionisation enthalpies of five elements of the second period is

Vedclass Test Series

Exam Paper Generator

Online Exam Module